多重荧光原位杂交检测骨髓增生异常综合征患者复杂核型异常

目的 探讨多重荧光原位杂交（M-FISH）技术存骨髓增牛异常综合征（MDS）患者复杂核型异常检测中的应用价值。方法 对10例常规R显带具有复杂染色体异常（CCA）的MDS患者应用M-FISH确定复杂染色体的重排及标记染色体的组成，识刖并确定微小易位。结果 M-FISH共检出37种结构重排，包括插入易位、缺夫、易值及衍生染色体，其中34种为不平衡重排；3种为平衡重排，包括：t（6；22）（q21；q12）、t（9；19）（q13；p13）和t（3；5）（？；？），有7种重排文献未见报道，涉及17号染色体的异常及-5／5q-最为常见（10例患者中两种异常各占7例）。结论 对伴有CCA的MDS患者M-FISH技术可以明确常规细胞遗传学（CC）分析中复杂染色体异常，并发现和纠正CC分析中漏检及误检的异常，为MDS患者染色体异常的分析提供了一种较理想的方法。

Multiplex fluorescence in situ hybridization in detecting complex chromosomal aberrations in myelodysplastic syndromes

Objective To explore the value of multiplex fluorescence in situ hybridization (M-FISH) technique in the detection of the complex chromosomal aberrations (CCAs) in myelodysplastic syndromes (MDS). Methods M-FISH was used in ten MDS patients with R-banding CCAs to refine the complex chromosomal rearrangements, the constitute of marker chromosomes, and to identify the cryptic translocations. Results Thirty-seven kinds of structural rearrangements were detected by M-FISH including insertion, deletion, translocation and derivative chromosomes, among which 34 kinds were unbalanced rearrangements, and 3 were balanced rearrangements including t(6;22)(q21;q12), t(9;19)(q13;p13) and t(3;5)(?;?). Seven abnormalities in the present paper were first reported in the literature. In addition, chromosome 17 aberrations (7/10) and -5/5q- (7/10) were the two most frequent abnormalities. Conclusions M-FISH could refine CCAs in MDS patients, find or correct the missed or misidentified abnormalities analysed by conventional cytogenetics.